Inox Wind Maintenance Engineer Interview Questions and Answers

Q1. Electrical basic and advance knowledge
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Q2. HT LT line, transformer,generator
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Q3. Igbt,thyrister,rectifier,inverter,diode
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Q1. Tell me about DFIG
Ans. 
DFIG stands for Doubly Fed Induction Generator, a type of generator used in wind turbines.
• DFIG is a type of generator commonly used in wind turbines

• It has two sets of windings - one connected to the grid and the other connected to a converter

• The converter allows control of the generator's output power and speed

• DFIG is known for its ability to provide variable speed operation and improved efficiency

• It is a popular choic...read more
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Q2. How wind power is generated
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Wind power is generated by harnessing the kinetic energy of wind to turn turbines, which then convert the energy into electricity.
• Wind turbines capture the kinetic energy of the wind and convert it into mechanical energy.

• The mechanical energy is then used to turn a generator, which produces electricity.

• Wind power is a renewable energy source that is clean and sustainable.

• Wind farms are large areas with multiple wind tu...read more
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Q1. Focus on roll and work wise technical skill.
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Q1. My experience with wind turnbine
Ans. 
I have extensive experience working with wind turbines, including maintenance, troubleshooting, and repairs.
• Performed regular maintenance checks on wind turbines to ensure optimal performance

• Troubleshooted and repaired mechanical and electrical issues as needed

• Worked with a team to install new wind turbines and ensure they were functioning correctly

• Utilized specialized tools and equipment to perform tasks safely and ef
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Q2. Roles and responsibilities at site incharge level
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Site incharge oversees operations, manages resources, ensures safety, and coordinates with stakeholders.
• Managing day-to-day operations at the site

• Supervising and coordinating with on-site staff and contractors

• Ensuring compliance with safety regulations and protocols

• Managing resources effectively to meet project deadlines

• Communicating with clients, vendors, and other stakeholders

• Troubleshooting technical issues and prov...read more
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Q1. How can you check what is problem in windvane if vane showing false reading.
Ans. 
To check the problem in a windvane showing false reading, first ensure it is properly aligned and calibrated. Then check for any obstructions or damage.
• Ensure the windvane is properly aligned and calibrated according to manufacturer's instructions.

• Check for any obstructions such as debris or bird nests that may be affecting the vane's movement.

• Inspect the vane for any damage or wear that could be causing inaccurate rea...read more
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Q2. How you control manpower on site.
Ans. 
Manpower on site is controlled through proper scheduling, supervision, communication, and monitoring.
• Create a detailed schedule outlining tasks, deadlines, and manpower requirements.

• Assign specific roles and responsibilities to each team member.

• Regularly communicate with the team to ensure everyone is on the same page.

• Supervise the work progress and address any issues or delays promptly.

• Monitor the performance of each ...read more
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Q1. Line diagram of WTG
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A line diagram of a wind turbine generator (WTG) shows the flow of energy from wind to electricity.
• The diagram typically includes the rotor blades, gearbox, generator, and power electronics

• The blades capture wind energy and turn the rotor, which drives the gearbox

• The gearbox increases the rotational speed and sends it to the generator

• The generator converts the rotational energy into electrical energy

• The power electroni...read more
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Q2. Working of DFIG converters
Ans. 
DFIG converters are used in wind turbines to convert variable frequency AC power to DC power and back to AC power.
• DFIG stands for Doubly Fed Induction Generator

• The converter consists of two back-to-back voltage source converters

• One converter controls the rotor current and the other controls the grid current

• The rotor current is controlled to maintain a constant torque on the turbine

• The grid current is controlled to main...read more
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Q1. What is the significance of mes
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MES stands for Manufacturing Execution System, which is a software system used in manufacturing to track and control production processes.
• MES helps in monitoring and controlling production processes in real-time

• It provides data collection, analysis, and reporting capabilities

• MES helps in improving efficiency, quality, and compliance in manufacturing operations

• Examples of MES software include Siemens SIMATIC IT, Rockwel...read more
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Q1. Scenario based questions
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Q1. Scenario based questions
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Q1. What is Plant load factor
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Plant load factor is a measure of the actual output of a power plant compared to its maximum possible output.
• Plant load factor is calculated by dividing the actual energy generated by the plant over a specific period by the maximum possible energy that could have been generated during the same period.

• It is expressed as a percentage and indicates how efficiently a power plant is being utilized.

• A high plant load factor i...read more
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Q2. What is machine availablity and how to calculate it
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Machine availability is the percentage of time a machine is able to be used for its intended purpose.
• Machine availability is calculated by dividing the total operating time by the total time in a given period, then multiplying by 100.

• For example, if a machine operates for 800 hours in a month and there are 1000 total possible operating hours, the availability would be 80%.

• Factors like downtime, maintenance, and repairs
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